Apparatus for grinding the surface of rollers.



J. KIR'NER. APPARATUS FOR GRINDING THE SURFACE OF ROLLERS. APPLICATION FILED FEB- 5,1914.

1,168,006, [Patented Jan. 11, 1916 sTA'r s ArrEN'r orFroE.

JOSEF KIRNER, or s'rUT'rGAaT, GERMANY, assiGNorc 'ro Nomvia coMPAGNmGEsELL- scrum: MIT .BESCHRAENKTEB HAF'rUNG, or CANNSTATT-STUTTGART, GERMANY,

A CORPORATION OF GERMANY.

ArrAaA'ros roR GRINDING THE summon Specification ofie'tters Patent.

or ROLLERS.

Patented Jan. 11, 1916.

Application filed February 5, 1914. Serial No. 816,785.

To all whom it may concern:

Be it known that I, Jhsnr zen of the German Empirefand residing at Stuttgart, Germany, have invented a new and useful Improvement in Apparatus for Grinding the Surface of Rollers, of which the following is a specification. This invention relates to a grinding machine for-grinding in a simple, eflicient and accurate manner the surfaces of rollers used for antifriction bearings and other purposes. In the accompanying drawings, which show an embodiment of my invention: Figure l-shows diagrammatically the mechanism for grinding the rollers"with. a bore, in front view, Fig. 2 is a side-view, Fig. :3 is a top-view, showing the grinding disk in section, and Figs. 4 and 5ar'e top-views of the roller and mounting therefor, showing details thereof.

Similar reference numerals indicate corresponding parts throughout the various,

views. The grindingdisk a is turned by the shaft 1) .in the direction of the arrow shown.- The roller 0 to be ground is carried bya suitable fixed support d, and sits loosely on the stationary guide pin 7, which can be suitably placed opposite the. disk at, so as to be in proper position, to hold the roller 0 against the grinding surface of the disk at, Thereby the roller 0 touches the grinding surface in a line of its convex or exterior surface. The components of themotion of the contact points coincident -withthis surface line bring about a grinding effect in this direction, whereas the components lying at right angles thereto bring about a turning of the roller on the pin f according to the arrow shown in Fig. 3. The condition for the existence of both of these effects is that the contact surface line should neither be coincident with a diameter of the grinding disk, nor lie in the middle of a chord. Depending on the regulation between these two limiting positions, one or the other or both of these effects may be made to prevail 'over the other. In.other words the line of contact of the work with said disk is at an angle to both the radial and chord lines of said disk which pass through said line of contact,

. -fwhereby a swiping action of the disk 00-,

rs. This swiping action is neither a direct direct tan- KIRNE a citi l desired surfaces of revolution.

gential pressure, but a compound between the two and acts not only to grind the roller longitudinally and to rotate itfto bring its circumference in position but also operates to hold item the work spindle. If now, a simple cylindrical pin be employed as a guide for the roller, in accordance with Fig. 4, then, under the influence of the rapid turning of the roller, a pendulum movement of the same around would take place, and the roller will swing to and fro as indicated in Fig. 4, between the position shown'in full lines and the posithe stationary pin f tion shown in dotted lines. The contact surface lines between the stone and the roller, which lines correspond to both of these positrons, would then have a different distance from the pin f, than is the case with the position shown in Fig. 3.

I According to the-{above invention, the roller 0 is thereby given a secure guidance, in that the pin 7' touches in two lines, which. following Fig. 3, are forexample, thought generated thereby, that the forward surface of the originally cylindrical pin f is flattened, as shown in Fig. 3. The roller thus lies against the edges 9 and h and these gulding edges gandjhform with the'con tact surface I therewith a secure bearing for the roller. Instead of using the edges 9 and h, two separate rods iand 70, as shown in Fig. 5, may be used. Mathematically, three points in the interior of the roller are suflicient.

-l.t is advantageous not to place the guide pin f perpendicularly, but to so incline it with the remaining parts of the machine, that the rollers will lean against the guide pin by reason of their own weight. In order that the original, that is, plane form of the grinding surface is maintained, the guide pin f can be moved during the grind- I ing to and fro paral l el with the grinding surface The lnvention is aciapted not only to the working of cylindrical surfaces, but to other the making of other than regular surfaces, the grinding plate must ingly curved form, and must be kept permanently in this form, for example, by suitable supplementary relative movements between the piece worked upon, respectively, the guide pin and disk.

line athree-edged prism, and

If it concerns show a correspond- 'Although the invention has special advantages'for the making of rollers whose exterior surfaces should be exactlyaxially arranged with respect to the boring passing throughit, its application is not limited to the making of such rollers, but inthe same .manner otherrrollers also, as for instance,

'rollers with pivots or pegs, could also be ground,

Several embodiments ofmy lnvention have been shown, and it is clear that changes may be made therein without departing from v appended claims;

Having thus descrlbed my invention, What the spirit of'the invention as defined in the I desire to secure by Letters Patent is? L A roller ,grinding machinecomprising a rotary disk having'a facial grinding sura rotary disk ;'simultaneously' grind the surface thereof and to rotate said roller to cause the longitudinal,

line of grinding contact to traverse the circumference of said roller. 4

2. A roller grinding machine comprising having a facial grinding surface, and a work holder having two points of face thereof and to rotate contact with the interior of the roller to be ground and adapted to hold said roller along line of grinding contact in a longitudinal engagement with face, the face of swiping contact with said operative to simultaneously said -facial grinding sursaid rotary disk having a roller and being grind the sur- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patenta.

a. rotary disk I face, and a work holder including a guide roller. 4. A roller grinding-machine comprising a facial grinding sur spindlesaid roller to meaeoe cause the longitudinal line of grinding contact to roller. I

3. A roller grinding machine comprising having'a facial grinding surspindle disposed at an angle to the radial and. chord lines of said roller along a longitudinal line of grinding vcontact in engagement with said facial grind- 1 ing surface, the face of said rotary disk having a swiping contact with, said roller and being operative to simultaneously grind the traverse the circumference of said disk and adapted to loosely engage the bore of and hold a I surface thereof and to rotate said roller to cause the longitudinal line of grinding contact to traverse the circumference of said a.rotary disk having face, and a work holder including a disposed in front of said facial grindinges face at an angle to the radial and choir lines of said disk and inclined toward a'i surface, said spindle Loin'g ad'apt'edfto lo ely engage the bore of a roller to be ground? to hold such-roller along a longitudinal eof gr nding contact in engagement with sai grinding surface, the face of said dlsk having a swlpmg contact with- 'saij' roller and being operative to simultaneously, grind thesurface thereof and to rotate said-T;

the circumference of roller to cause the longitudinal line'of gr'in'ding contact to traverse said roller.

.. In testimony that I claim the for g in presence of two subscribing witnesses.

' JOSEF KIRNER.

as my invention, I have signed my .name

\Vitnesses:

PHILIPP 'SOHAFFER, SOPHIE ECKERT.

Washington, 13.9." 

